Upstream information
Description
dhcpcd through 10.3.2, fixed in commit 2f00c7b, contains a one-byte stack out-of-bounds write vulnerability in dhcp6_makemessage() in src/dhcp6.c that allows unauthenticated same-link attackers to write beyond a fixed local buffer by serializing an oversized RFC6603 OPTION_PD_EXCLUDE option body. Attackers can send a crafted DHCPv6 ADVERTISE message containing an IA_PD IAPREFIX /0 with a valid OPTION_PD_EXCLUDE using an exclude prefix length of /121 through /128 to trigger the out-of-bounds write and potentially corrupt adjacent stack memory.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 5.3 | 5.9 |
| Vector | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H |
| Attack Vector | Adjacent Network | Adjacent Network |
| Attack Complexity | High | High |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | Low |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 6 | 6 |
| Vector | CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Adjacent Network | Adjacent Network |
| Attack Complexity | Low | High |
| Attack Requirements | Present | Present |
| Privileges Required | None | None |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | None | Low |
| Vulnerable System Availability Impact | High | High |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | None | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Server 16.0 | dhcpcd | Affected |
| SUSE Linux Enterprise Server 16.1 | dhcpcd | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | dhcpcd | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | dhcpcd | Affected |
| SUSE Linux Micro 6.2 | dhcpcd | Affected |
| openSUSE Leap 16.0 | dhcpcd | Affected |
| Products at an unknown state of their lifecycle. | ||
| SLES-CHOST-BYOS-Aliyun | dhcpcd | Affected |
| SLES-CHOST-BYOS-Azure | dhcpcd | Affected |
| SLES-CHOST-BYOS-EC2 | dhcpcd | Affected |
| SLES-CHOST-BYOS-GCE | dhcpcd | Affected |
| SLES-CHOST-BYOS-GDC | dhcpcd | Affected |
| SLES-CHOST-BYOS-SAP-CCloud | dhcpcd | Affected |
| Container Status | ||
| kiwi-templates-Minimal-Cloud-sap kiwi-templates-Minimal-VMware-sap | dhcpcd | Affected |
SUSE Timeline for this CVE
CVE page created: Tue Jun 23 20:05:17 2026CVE page last modified: Wed Jun 24 15:30:27 2026